Hey, Stevie. Stick to chemistry. Before you go popping off on Americans dropping letters, lets look at the British pronunciation of such words as "hello". There's an f'ing H in it, pronounce it Dammit! Even the queen gets that one wrong. And then there's any word that ends with -ar, -er, -ir, -or, and -ur. These words have an R at the end, not an A. Hamburger, not hambahgah. Pronounce the R, dammit, it's not just for decoration. And lastly, words that end with A. Why do you insist on using an -er? The President of the United States of Americer. What a lovely ring that has.
I'm not saying one is better than the other, I hear both every day. I'm just sayin' this is one of those threads that is like winning the Special Olympics.